胰腺癌中RECK和MMP-9蛋白的表达及临床病理意义

目的 观察RECK和MMP-9在胰腺癌组织中的表达,探讨其与胰腺癌临床病理特征的关系.方法 采用免疫组化PV6000法检测28例胰腺癌及10例正常胰腺组织中RECK、MMP-9的表达,应用SPSS13.0软件对RECK、MMP-9的表达与肿瘤临床病理特征的关系进行统计学分析.结果 RECK在胰腺癌组织中的阳性表达率为46.4%(13/28),显著低于它在正常胰腺组织中90.0%(9/10)的阳性表达率.胰腺癌临床分期为Ⅰ+Ⅱ期组的RECK阳性表达率(75.0%,9/12)明显高于Ⅲ+Ⅳ期组(25.0%,4/16,P＜0.05),无远处转移组的RECK阳性表达率(60.0%,12/20)明显高于有远处转移组(12.5%,1/8,P＜0.05).MMP-9在胰腺癌组织中的阳性表达率为75.0%(21/28),显著高于正常胰腺组织中的20.0%(2/10)阳性表达率(P＜0.01).胰腺癌临床分期为Ⅰ+Ⅱ期组的MMP-9阳性表达率(50.0%,6/12)明显低于Ⅲ+Ⅳ期组(93.8%,15/16,P＜0.05),肿瘤高分化组的MMP-9阳性表达率(33.3%,1/3)明显低于低分化组(100%,12/12,P＜0.01).胰腺癌组织中RECK与MMP-9的表达呈负相关(r=-0.536,P＜0.01).结论 胰腺癌组织中RECK呈低表达,MMP-9呈高表达,RECK、MMP-9联合检测可以作为胰腺癌临床分期评估的指标.

Expression of RECK and MMP-9 in pancreatic cancer and its clinicopathological significance

Objective To investigate the expression of RECK and MMP-9 in pancreatic cancer and to explore the relationship between RECK, MMP-9 expression and the clinicopathological characteristics.Methods PV6000 immunohistochemical method was used to detect the expression of RECK and MMP-9 in 28 cases of pancreatic cancer and 10 cases of normal pancreatic tissue. All the statistical analyses were performed by using SPSS 13.0 statistical software to determine the relationship between RECK, MMP-9 expression and the clinicopathological characteristics. Results The overall positive rate of RECK espression was 46.43% (13/28)in pancreatic cancer, which was significantly lower than that in normal pancreatic tissue (90%, 9/10). The positive rate of RECK espression in Ⅰ + Ⅱ clinical stage (75.0% ,9/12) was significantly higher than that in Ⅲ + Ⅳ stage (25.0%, 4/16 P < 0.05 ). The positive rate of RECK expression in cases without distant metastases (60.0%, 12/60) was significantly higher than that in cases with distant metastasis (12.5%, 1/8,P<0.05). The overall positive rate of MMP-9 was 75% (21/28) in pancreatic cancer, and 20% (2/10) in normal pancreatic tissue. The comparison between these two groups indicated a significant difference (P <0.01 ). The positive rate of MMP-9 in Ⅰ + Ⅱ clinical stage(50.0% ,6/12) was significantly lower than that in Ⅲ + Ⅳ stage (93.8,15/16, P < 0.05). The positive rate of MMP-9 in well differentiation group(33.3%,1/3 ) was significantly lower than that in poor differentiation group ( 100%, 12/12 ,P < 0. 01 ). The expressionof RECK was negatively correlated with the expression of MMP-9 ( r = - 0. 536, P < 0.01 ). Conclusions RECK is lowly expressed in pancreatic cancer, but MMP-9 is highly expressed. RECK and MMP-9 may serve as important markers in the evaluation of tumor stage.